loss of signal

a fine line between stupid and clever

loss of signal

Postby nyazzip » Wed Sep 06, 2017 11:52 am

i have a simple SE guitar amp that suddenly got very quiet. no buzzing or anything, just barely any output, overnight(worked one day, didn't the next). tube swapping doesn't help...if i crank it to 10 i can hear it, but of course it isn't really useable like this.
i looked briefly at the PCB and didn't notice any fried or bulging components. i'm thinking maybe simple corrosion at an input or output jack? anything else i might look for?

regards.
been busy the last few years and haven't been tinkering with amps at all. hope everyone is well
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Re: loss of signal

Postby mike567 » Fri Sep 08, 2017 8:13 am

Is your cable good?
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Re: loss of signal

Postby nyazzip » Mon Sep 11, 2017 11:50 pm

yep, went through all the possible external reasons... speakers, jacks, cables, instruments, tubes, my imagination, ears, etc

:/
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Re: loss of signal

Postby Gingertube » Tue Sep 12, 2017 12:47 am

Check preamp tube heater wiring - is it lighting up?
Check screen supply to the output tube - is it getting volts.
Cheers,
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